发布时间 : 星期五 文章基于AT89C51单片机的抢答器设计更新完毕开始阅读d0d33929302b3169a45177232f60ddccda38e62a
ached)andon-timecontrolproblems;severitygreaterrisk,accordingtotherequiredtroubleshooting,registrationform,andsignedbythoseresponsibleforthesecurityoftheunitforthefirstafterescalation.hirdarticleopenminemanageroncoalmineproductionjobdistrictwithinofsecurityhiddentroubleshooting,andgovernanceandreportfullisresponsiblefor;securityDeputyManagertieManagerwork,theparagraphconstructionteamheadandthebusinessdepartmentheadMember,andrunmaintenancepersonnel,areshouldaccordingtotheirofdutiesrange,onproductionequipment,andfacilities,andsiteenvironment,aspectsofsecurityhiddenforcheckandreport,andbyhiddenrectificationprogrammeforhiddengovernance.Fourthopen-pitminesafetysectionisresponsibleforthesupervisionandinspectionintheproductionareatroubleshooting,managementandreportingofcomprehensivework.Articlescopeandfocusoftheinspectionpersonnelatvariouslevels:1,operatingpersonnelbeforetakingoverandshiftbeforethejurisdictionareatoconductacomprehensiveinspectionofequipment,runningthesquadlea
基于AT89C51单片机的抢答器设计
硬件设计：
一、 项目要求：
基于AT89C51单片机设计制作一个抢答器，晶振采用12MHZ，具体设计要求如下：
1.设计一个智力竞赛抢答器，可同时供8名选手参加比赛，编号为1、2、3、4、5、6、7、8，各用一个按钮。
2.给节目主持人设置一个控制开关，用来控制系统的清零和抢答开始 3.抢答器具有所锁存功能、显示功能和声音提示功能。抢答开始后若选手按动抢答按钮，编号立即锁存，并在LED数码管上显示选手编号，同时亮灯伴随声音提示。此外要封锁输入电路，禁止其他选手抢答，最先抢答选手的编号一直保持到主持人将系统请0. 二、 框图设计：
基于AT89C51单片机抢答器由控制核心AT89C51单片机、复位电路、电源电路、选手按键、主持人按键、声音提示和数码显示等部分构成，系统框图如图示
电源电路 复位电路 选手按键 主持人按键 AT89C52 单片机 声音提示 数码显示 erondutyduringmajorequipmentoverhaul,beforeandaftertheshifttodesignatedstafftounderstandtheoperationofequipmentintheequipmentandcheckonfocus.2,equipmentrepairequipmenttoselectmaintenancecheckatleasttwiceaweektokeyequipmentanddefectivedevicestoincreasethefrequencyofinspection.Teamleaderdedicatedtothedeviceeverydayoperationofalldeviceswithinthescopeofmaintenancepersonnelunderstandthemaintenanceandinspectionofkeyequipment.Paragraph3,theownerandprofessionalandtechnicalpersonnelshouldbecarriedoutdailyafterworksitevisitinspection...Evening.Controlroom:focusedoncoalseamspontaneouscombustionundertroubleshooting,help,landslide,coalfire,earth-moving,roadcarwallsitesafetysupervision,andconscientiouslyimplementtheminerectificationmeasures.Productiontechnologysection:isresponsiblefortroubleshootingwhetherexistsSupercapacity,andSuperached)andon-timecontrolproblems;severitygreaterrisk,accordingtotherequiredtroubleshooting,registrationform,andsignedbythoseresponsibleforthesecurityoftheunitforthefirstafterescalation.hirdarticleopenminemanageroncoalmineproductionjobdistrictwithinofsecurityhiddentroubleshooting,andgovernanceandreportfullisresponsiblefor;securityDeputyManagertieManagerwork,theparagraphconstructionteamheadandthebusinessdepartmentheadMember,andrunmaintenancepersonnel,areshouldaccordingtotheirofdutiesrange,onproductionequipment,andfacilities,andsiteenvironment,aspectsofsecurityhiddenforcheckandreport,andbyhiddenrectificationprogrammeforhiddengovernance.Fourthopen-pitminesafetysectionisresponsibleforthesupervisionandinspectionintheproductionareatroubleshooting,managementandreportingofcomprehensivework.Articlescopeandfocusoftheinspectionpersonnelatvariouslevels:1,operatingpersonnelbeforetakingoverandshiftbeforethejurisdictionareatoconductacomprehensiveinspectionofequipment,runningthesquadlea
基于AT89C51单片机抢答器系统框图
本项目需要通过学习和查阅资料，掌握和了解如下知识： ? +5V电源原理及设计
? 单片机复位电路工作原理及设计 ? 单片机晶振电路工作原理及设计 ? 按键电路设计 ? 蜂鸣器驱动电路设计 ? 数码管特性及使用 ? AT89C51单片机引脚 ? 单片机汇编语言及程序设计 电路原理图：
其工作原理为：电源电路为单片机以及其他模块提供标准5V电源。晶振模块为单片机提供时钟标准，使系统各部分协调工作。复位电路模块为单片机系统提供复位功能。单片机作为主控制器，根据输入信号对系统进行相应的控制。选手按下相应的键，蜂鸣器发出提示音，直到按键释放。数码管显示最先按下选手的编号。选手回答完毕，主持人按下准备按钮，数码管清零，蜂鸣器停止发声，可以进入下一题的抢答。
erondutyduringmajorequipmentoverhaul,beforeandaftertheshifttodesignatedstafftounderstandtheoperationofequipmentintheequipmentandcheckonfocus.2,equipmentrepairequipmenttoselectmaintenancecheckatleasttwiceaweektokeyequipmentanddefectivedevicestoincreasethefrequencyofinspection.Teamleaderdedicatedtothedeviceeverydayoperationofalldeviceswithinthescopeofmaintenancepersonnelunderstandthemaintenanceandinspectionofkeyequipment.Paragraph3,theownerandprofessionalandtechnicalpersonnelshouldbecarriedoutdailyafterworksitevisitinspection...Evening.Controlroom:focusedoncoalseamspontaneouscombustionundertroubleshooting,help,landslide,coalfire,earth-moving,roadcarwallsitesafetysupervision,andconscientiouslyimplementtheminerectificationmeasures.Productiontechnologysection:isresponsiblefortroubleshootingwhetherexistsSupercapacity,andSuperached)andon-timecontrolproblems;severitygreaterrisk,accordingtotherequiredtroubleshooting,registrationform,andsignedbythoseresponsibleforthesecurityoftheunitforthefirstafterescalation.hirdarticleopenminemanageroncoalmineproductionjobdistrictwithinofsecurityhiddentroubleshooting,andgovernanceandreportfullisresponsiblefor;securityDeputyManagertieManagerwork,theparagraphconstructionteamheadandthebusinessdepartmentheadMember,andrunmaintenancepersonnel,areshouldaccordingtotheirofdutiesrange,onproductionequipment,andfacilities,andsiteenvironment,aspectsofsecurityhiddenforcheckandreport,andbyhiddenrectificationprogrammeforhiddengovernance.Fourthopen-pitminesafetysectionisresponsibleforthesupervisionandinspectionintheproductionareatroubleshooting,managementandreportingofcomprehensivework.Articlescopeandfocusoftheinspectionpersonnelatvariouslevels:1,operatingpersonnelbeforetakingoverandshiftbeforethejurisdictionareatoconductacomprehensiveinspectionofequipment,runningthesquadlea
基于AT89C51的单片机抢答器元件清单如下： 序号 元件名称 规格 1 AT89C51 51单片机 2 晶振 12M立式 3 集成电路 74LS245(8路总线接收/发送器) 4 八段数码管 一位共阴极 5 9015 三极管 6 7 8 9 10 11 起振电容 复位电容 复位电阻 限流电阻 喇叭 按键 按键 电源 30pF瓷片电容 10uF/10V 10K欧 500欧 8欧/05W 5V/05A 数量 1个 1个 1个 用途 控制核心 晶振电路 驱动 1个 1个 2个 1个 1个 1个 1个 1个 8个 1个 显示电路 蜂鸣器机器驱动电路 晶振电路 复位电路 复位电路 限流电路 蜂鸣器及其驱动电路 主持人按键 选手按键 提供+5V 软件设计：
上电复位后数码管清零，P2.0置高电平，蜂鸣器不发声，循环扫描P3口，看是否有按键按下，如果有按键按下，则转入判断是哪个选手按下按键，并在数码管上显示选手号；P2.0置低电平，蜂鸣器发生，主持人按键按下，系统重新进入主程序继续进行下一轮抢答。程序流程图如下
erondutyduringmajorequipmentoverhaul,beforeandaftertheshifttodesignatedstafftounderstandtheoperationofequipmentintheequipmentandcheckonfocus.2,equipmentrepairequipmenttoselectmaintenancecheckatleasttwiceaweektokeyequipmentanddefectivedevicestoincreasethefrequencyofinspection.Teamleaderdedicatedtothedeviceeverydayoperationofalldeviceswithinthescopeofmaintenancepersonnelunderstandthemaintenanceandinspectionofkeyequipment.Paragraph3,theownerandprofessionalandtechnicalpersonnelshouldbecarriedoutdailyafterworksitevisitinspection...Evening.Controlroom:focusedoncoalseamspontaneouscombustionundertroubleshooting,help,landslide,coalfire,earth-moving,roadcarwallsitesafetysupervision,andconscientiouslyimplementtheminerectificationmeasures.Productiontechnologysection:isresponsiblefortroubleshootingwhetherexistsSupercapacity,andSuperached)andon-timecontrolproblems;severitygreaterrisk,accordingtotherequiredtroubleshooting,registrationform,andsignedbythoseresponsibleforthesecurityoftheunitforthefirstafterescalation.hirdarticleopenminemanageroncoalmineproductionjobdistrictwithinofsecurityhiddentroubleshooting,andgovernanceandreportfullisresponsiblefor;securityDeputyManagertieManagerwork,theparagraphconstructionteamheadandthebusinessdepartmentheadMember,andrunmaintenancepersonnel,areshouldaccordingtotheirofdutiesrange,onproductionequipment,andfacilities,andsiteenvironment,aspectsofsecurityhiddenforcheckandreport,andbyhiddenrectificationprogrammeforhiddengovernance.Fourthopen-pitminesafetysectionisresponsibleforthesupervisionandinspectionintheproductionareatroubleshooting,managementandreportingofcomprehensivework.Articlescopeandfocusoftheinspectionpersonnelatvariouslevels:1,operatingpersonnelbeforetakingoverandshiftbeforethejurisdictionareatoconductacomprehensiveinspectionofequipment,runningthesquadlea程序流程图：
开始 初始化 有选手按键 判断选手 显示选手号 蜂鸣器发生 小结：
主持人按键按下 1. 程序调试参考了好多资料，也请教了同学,最后编程问题都得到了解决
2. 在Protus中画图失败，以至于不能仿真出来结果
3. 理论联系实际，培养自学能力，和动手能力，学会了怎么更好的处理知识和实践相结合的问题
4. 为以后有关单片机只是的学习积累宝贵经验
附：
源程序代码如下： ORG 0000H JMP BEGIN
TABLE: ;共阴极数码管显示代码表 DB 3FH,06H,5BH,4FH,66H, ;01234
erondutyduringmajorequipmentoverhaul,beforeandaftertheshifttodesignatedstafftounderstandtheoperationofequipmentintheequipmentandcheckonfocus.2,equipmentrepairequipmenttoselectmaintenancecheckatleasttwiceaweektokeyequipmentanddefectivedevicestoincreasethefrequencyofinspection.Teamleaderdedicatedtothedeviceeverydayoperationofalldeviceswithinthescopeofmaintenancepersonnelunderstandthemaintenanceandinspectionofkeyequipment.Paragraph3,theownerandprofessionalandtechnicalpersonnelshouldbecarriedoutdailyafterworksitevisitinspection...Evening.Controlroom:focusedoncoalseamspontaneouscombustionundertroubleshooting,help,landslide,coalfire,earth-moving,roadcarwallsitesafetysupervision,andconscientiouslyimplementtheminerectificationmeasures.Productiontechnologysection:isresponsiblefortroubleshootingwhetherexistsSupercapacity,andSuper